Fix to MXS-365: https://mariadb.atlassian.net/browse/MXS-365 Added tracking of LOAD DATA LOCAL INFILE

While a LOAD DATA LOCAL INFILE query is being executed, all queries will be sent to the master
and they will not be processed as normal packets.

server/modules/include/readwritesplit.h

@@ -293,6 +293,9 @@ struct router_client_session {
         int              rses_capabilities; /*< input type, for example */
         bool             rses_autocommit_enabled;
         bool             rses_transaction_active;
+        bool             rses_load_active; /*< If LOAD DATA LOCAL INFILE is
+                                            * being currently executed */
+        uint64_t         rses_load_data_sent; /*< How much data has been sent */
         DCB* client_dcb;
         int             pos_generator;
 #if defined(PREP_STMT_CACHING)